Cygwin/X is a port of the X Window System to the Microsoft Windows family of operating systems. Cygwin/X runs on all recent consumer and business versions of Windows; as of 2003-12-27 those versions are specifically Windows 95, Windows 98, Windows Me, Windows NT 4.0, Windows 2000, Windows XP, and Windows Server 2003.

Cygwin/X consists of an X Server, X libraries, and nearly all of the standard X clients, such as xterm, xhost, xdpyinfo, xclock, and xeyes. Cygwin/X, as the name implies, uses the Cygwin project which provides a UNIX-like API to Xlib and X clients, thereby minimizing the amount of porting required.

Cygwin/X is licensed under an X style license; Cygwin is licensed under a modified GNU General Public License that specifically allows libcygwin1.a to be linked to programs that are licensed under an Open Source compliant license without such linking requiring that those Open Source programs be licensed under the GNU General Public License (see the Cygwin licensing page for more information). Source code and binaries for both projects are freely available.

WeirdX : It is derived from WiredX-Lite and will run on any platforms which support Java.  This X server will not be suitable to exec heavy x clients, but you may find that twm, xterm, etc. will run fine on it.

Features:

    * WeirdX handles x protocols directly.
    * WeirdX supports core protocols of X11R6.3 partially.
    * WeirdX is implemented with JDK 1.1.
    * WeirdX runs as an application/applet.
    * WeirdX supports Rootless mode.
    * WeirdX runs as a TrueType font X Server if your JVM supports TrueType fonts.
    * WeirdX supports the three mouse button emulation.
    * WeirdX supports copy/paste operations between the native window system and x clients via CUT_BUFFER0.
    * WeirdX supports 1bpp, 8bpp and 16bpp mode.
    * WeirdX supports multibyte characters; Japanese, Korean and Chinese characters.
    * WeirdX allows you to get secure X accesses in pure Java by using JSch.new!
    * JRexec is included.
    * WeirdX supports XDMCP.
    * WeirdX supports dxpc(Differential X Protocol Compressor) with the assistance of JDxpc.
    * WeirdX includes hacks for the alpha transparency.
    * WeirdX supports EsounD compatible applications.
    * WeirdX includes the XJS Extension written by Christian Werner.
    * WeirdX is distributed under GNU GPL.
    * WeirdX is not WiredX.

Win32-X11 :: The aim of this project is to provide an Open Source GDI/DirectX based X-server for Windows 9x/NT Operating Systems built on top of X11R6.5.1.